Drum-trap.



bvihwooco 6%@% v 41014101 R. WENSLEY J'R.

DRUM TRAP. APPLICATION FILED FEB. 17, 1906.

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' PATENTBD DEC. 25, 1906.

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' body of the trap is ordinaril made to overlap the edge.

sure is provided with an exteriorly-threaded RICHARD wENs YQJa, or DENVER, ooLoRAno I DRUMJ'RAP.

No. s39, 24o.

"Patented Dec. 25, 1906. I

- Applicationfiled February 17.190 Seria1No.301,534.

To all whom it concern/ Be it known that I, RIcHARnWENsLEY, J r.,

a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Drum-Traps; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in drum-traps for plumbers use, my object being to provide a fluid-tight joint between the cap and the bodyof the trap and at the same time protect the threads of the trap from the corrosive action of its gaseous contents.

This invention belongs to the class of trap in which a screw cap or closure is employed, and the invention is applicable to other constructions adapted to perform a similar function. 9

My further object is to provide'a construction of this class adapted to obviate the necessity of a separate packing-washer.

In. my improved construction I employ a metal ring screw-threaded interiorly and having an interiorly-projecting ledge at the bottom of the screw-threaded portion. The top of the body of the tra is bent inwardly and The cap or clodepending' flange adapted to engage the interior threadsof the ring of the trap. The lower edge of the cap is provided with a circular knife-edge adapted to indent the soft metal of the topof the trap, whichmetal is supported by the ledge of the ring. The composed of lead, which is sufficiently so to allow the sharp edge of the flange of the cap or closure to indent thesame between the chamber of the trap and the screw-threads of the cap and ring, p v

Having briefly outlined my improved con- .struction, I will proceed to describe the same trap provided with my improved construction, with the arts shown on a larger scale. The same re erence characters indicate the same parts in allthe views.

Let the numeral 5 designate'the body of the trap, which, as heretofore indicated, it

will be assumed, is composed of lead or similar soft metal. The ring 6, which is preferably coinposed of brass, is provided with an interiorly-projecting flange or ledge 7. This ring above the flange is interiorly threaded, as shown at 8, to engage exterior threads of a depending flange 9, formed on the cap or closure 10.

In order to connect the body of the trap with the ring 6, the upper extremity of the trap is carried inwardly and caused to engage the rounded bottom part of the flange 7, and is then bent'outwardly on top of the flange or ledge 7 and pressed down against the threaded portion of the ring. The lower edge of the depending flange of the cap or closure 10 is providedwith a thin edge 12, adapted to indent the portion 13 of the body of the trap which lies above the ledge 7. This part 13 of the body of the trap really forms a packing-washer, the same being integral with the traps body.

In order to close the trap, it is only necessary to screw the cap 10 into the ring 6 and down against the soft-metal part 13 of the body of the trap. This makes a fluid-tight joint and prevents the contents of the trap from coming in contact with the threads body of the trap and having an interiorlyprojecting ledge, over which the top of the trap is bent, the ring having a-portion extending upwardly above its ledge and interiorly threaded, and a cap or closure having a depending flange exteriorly threaded to engage the ring, the bottom of the flange of the cap being provided with a thin edge adapted IIO to indent the portion of the tra p s body ring, the bottom of the cap s flange being which is supported by the ledge of the ring. formed into a thin edge adapted to indent a 3. In a structure ofthe class described, the portion of the body of the trap supportedby combination of the soft-metal body of the the ledge, for the purpose set forth. 5 trap, a ring of harder metal surrounding the In testimony whereof I aflix my signature 15 top of the trap and having a ledge over which in presence of two Witnesses.

the upperedge ofthe-body of the trap is bent, RICHARD VVENSLEY, J R. the ring being interiorly threaded, and a cap Witnesses: having a depending eXteriorly threaded DENA NELSON,

I0 flange adapted to engage the threads of the I OTTO E. HoDDIoK. 

